Display panel, preparation method thereof and display device

Abstract

The application relates to a display panel, a preparation method thereof and a display device. The display panel comprises a substrate, a light-emitting layer comprising a plurality of light-emitting structures, and a color film filter layer arranged on the side of the light-emitting layer away from the substrate, wherein the color film filter layer comprises a plurality of light-filtering portions and a plurality of light-blocking portions. The light-filtering portion is at least partially overlapped with the light-emitting structure in the orthographic projection of the substrate, and the light-filtering portion is located between two adjacent light-blocking portions. The end of the light-filtering portion close to the light-blocking portion covers a first part of the light-blocking portion. A groove is arranged on the surface of the second part of the light-blocking portion away from the substrate, and the second part is the part not covered by the light-filtering portion. The barrier layer comprises a plurality of dam structures arranged on the surface of the second part of the light-blocking portion away from the substrate. The orthographic projection of the dam structure is located in the orthographic projection of the light-blocking portion, and the dam structure is used for blocking the overflow of the material of the light-filtering portion. Thus, the display color deviation and the screen-out color deviation of the display panel are improved.

Description

Technical Field

[0001] This application relates to the field of display technology, and in particular to a display panel, a method for manufacturing the same, and a display device. Background Technology

[0002] OLED (Organic Light Emitting Diode) display panels have many advantages such as low energy consumption, low cost, self-illumination, wide viewing angle and fast response speed, and are one of the hot topics in the field of electronic display device research today.

[0003] In order to improve the light transmittance and reduce the thickness of the screen, OLED display panels in related technologies usually adopt PLP (Pol-less Panel) technology. Common PLP technologies include the technology of integrating the color filter (CF) into the encapsulation layer (Color On Encapsulation, COE).

[0004] However, OLED display panels using COE technology suffer from color shift issues, including color shift when the screen is off. Summary of the Invention

[0005] Therefore, it is necessary to provide a display panel, its manufacturing method, and a display device that can improve display color shift and screen-off color shift.

[0006] In a first aspect, embodiments of this application provide a display panel, including:

[0007] substrate;

[0008] A light-emitting layer is disposed on one side of the substrate, and the light-emitting layer includes multiple light-emitting structures;

[0009] A color filter layer is disposed on the side of the light-emitting layer opposite to the substrate. The color filter layer includes multiple filtering portions and multiple light-shielding portions. The projection of the filtering portion onto the substrate at least partially overlaps with the projection of the light-emitting structure onto the substrate. The filtering portion is located between two adjacent light-shielding portions. The end of the filtering portion near the light-shielding portion covers a first portion of the light-shielding portion. A groove is formed on the surface of the second portion of the light-shielding portion on the side away from the substrate. The second portion is the portion not covered by the filtering portion.

[0010] The barrier layer includes multiple dam structures disposed on the surface of the second portion of the light-shielding part away from the substrate. The orthographic projection of the dam structure onto the substrate is located within the orthographic projection of the light-shielding part onto the substrate. The dam structure is used to block material overflow from the light-filtering part.

[0011] In one embodiment, the groove is located between the dam structure and the first portion of the shading portion.

[0012] In one embodiment, the size of the groove is the same as the size of the dam structure along the direction from the first portion to the second portion.

[0013] In one embodiment, the groove is disposed around the filter portion, and the dam structure is disposed around the filter portion.

[0014] In one embodiment, the surface of the second portion of each of the light-shielding portions facing away from the substrate is provided with a plurality of the grooves and a plurality of the dam structures;

[0015] Optionally, the arrangement of the plurality of grooves and the plurality of dam structures includes at least one of the following:

[0016] The plurality of grooves are arranged sequentially along the circumferential direction of the filter portion;

[0017] The plurality of grooves are arranged sequentially along the connecting line between two adjacent filter portions;

[0018] The plurality of the dam structures are arranged sequentially along the circumference of the filter section;

[0019] The plurality of the dam structures are arranged sequentially along the connecting line between two adjacent filter sections;

[0020] Along the circumference of the filter section, the dam structure and the groove are arranged alternately.

[0021] In one embodiment, the material of the dam structure is the same as the material of the shading part.

[0022] In one embodiment, the plurality of filter portions include a red filter portion, a green filter portion, and a blue filter portion;

[0023] The thickness of the green filter is greater than the thickness of the red filter, and the thickness of the red filter is greater than the thickness of the blue filter.

[0024] Optionally, the number of dam structures and grooves between the green filter and the adjacent blue filter is greater than the number of dam structures and grooves between the red filter and the adjacent blue filter.

[0025] Optionally, the number of dam structures and grooves between the green filter and the adjacent blue filter is greater than the number of dam structures and grooves between the green filter and the adjacent red filter.

[0026] Optionally, the thickness of the dam structure between the green filter and the adjacent blue filter, and the depth of the groove, are both greater than the thickness of the dam structure between the red filter and the adjacent blue filter, and the depth of the groove.

[0027] Optionally, the thickness of the dam structure between the green filter and the adjacent blue filter, and the depth of the groove, are both greater than the thickness of the dam structure between the green filter and the adjacent red filter, and the depth of the groove.

[0028] Secondly, embodiments of this application provide a display device, characterized in that it includes a display panel as described in the first aspect above.

[0029] Thirdly, embodiments of this application provide a method for manufacturing a display panel, comprising:

[0030] Provide substrate;

[0031] A light-emitting layer is formed on one side of the substrate, and the light-emitting layer includes multiple light-emitting structures;

[0032] A color filter layer is formed, wherein the color filter layer is disposed on the side of the light-emitting layer opposite to the substrate, and the color filter layer includes a plurality of filtering portions and a plurality of light-shielding portions; wherein the orthographic projection of the filtering portion on the substrate at least partially overlaps with the orthographic projection of the light-emitting structure on the substrate, and the filtering portion is located between two adjacent light-shielding portions; the end of the filtering portion near the light-shielding portion covers a first portion of the light-shielding portion; a groove is formed on the surface of the second portion of the light-shielding portion on the side opposite to the substrate, and the second portion is the portion not covered by the filtering portion;

[0033] A barrier layer is formed, the barrier layer including a plurality of dam structures, the dam structures being disposed on the surface of the second part of the light-shielding part opposite to the substrate, the orthogonal projection of the dam structures on the substrate being located within the orthogonal projection of the light-shielding part on the substrate, the dam structures being used to block the material overflow of the light-filtering part.

[0034] In one embodiment, forming the color filter layer includes:

[0035] A light-shielding film layer is formed, and the light-shielding film layer is located on the light-emitting side of the light-emitting layer;

[0036] The light-shielding film layer is etched to form the dam structure, the groove, the opening and the light-shielding part on the light-shielding film layer, wherein the opening corresponds one-to-one with the light-emitting structure;

[0037] The corresponding filter portion is formed within the opening.

[0038] In the aforementioned display panel, its manufacturing method, and display device, the end of the light-filtering portion near the light-shielding portion covers a first part of the light-shielding portion. The end of the light-filtering portion near the light-shielding portion is, for example, the edge of the light-filtering portion, and the first part of the light-shielding portion is, for example, the edge of the light-shielding portion. That is, the edge of the light-filtering portion is located on the surface of the adjacent light-shielding portion away from the substrate. Thus, the orthographic projection of the edge of the light-filtering portion on the substrate overlaps with the orthographic projection of the edge of the adjacent light-shielding portion on the substrate. In this way, in a direction parallel to the substrate and along the direction from the light-filtering portion to the light-shielding portion, the extension of the light-filtering portion and the coverage of a portion of the light-shielding portion away from the substrate are realized, thereby avoiding light leakage in the display. Based on this, the second part of the light-shielding section has a dam structure and a groove on the surface away from the substrate. The dam structure has the function of blocking and intercepting, and the groove also has the function of accommodating and blocking. During the fabrication of the filter section, when the filter section extends to the adjacent light-shielding section to cover part of the surface of the light-shielding section away from the substrate, the dam structure and the groove work together to block the filter section from overflowing through the surface of the adjacent light-shielding section away from the substrate to other filter sections of different colors. This avoids the presence of a filter section of another color at the location of a filter section of one color, thereby improving the display color shift and the color shift when the screen is off. Attached Figure Description

[0039] To more clearly illustrate the technical solutions in the embodiments of this application or the conventional technology, the drawings used in the description of the embodiments or the conventional technology will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0040] Figure 1 This is a top view schematic diagram of a display panel according to one embodiment;

[0041] Figure 2 for Figure 1 One of the schematic cross-sectional views along line CC';

[0042] Figure 3 One of the schematic diagrams showing the dam structure and groove arrangement around a filter section;

[0043] Figure 4 This is the second schematic diagram showing the dam structure and groove arrangement around a filter section;

[0044] Figure 5 The third schematic diagram shows the dam structure and groove arrangement around a filter section;

[0045] Figure 6 for Figure 1 Second cross-sectional view along line CC';

[0046] Figure 7 for Figure 1 Third cross-sectional view along line CC';

[0047] Figure 8 This is a schematic diagram of a display device according to one embodiment;

[0048] Figure 9 This is a schematic flowchart illustrating a method for manufacturing a display panel according to one embodiment.

[0049] Explanation of reference numerals in the attached drawings: 10-substrate, 20-light-emitting layer, 30-encapsulation layer, 40-color resist layer, 50-light-shielding part, 401-green filter part, 402-red filter part, 403-blue filter part, 60-dam structure, 70-groove, 80-touch layer, 90-transparent protective film. Detailed Implementation

[0050] To facilitate understanding of this application, a more complete description will be provided below with reference to the accompanying drawings, which illustrate embodiments of the present application. However, the present application can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided so that the disclosure of this application will be more thorough and complete.

[0051] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application.

[0052] It is understood that the terms "first," "second," etc., used herein may be used to describe various elements, but these elements are not limited by these terms. These terms are only used to distinguish one element from another. For example, without departing from the scope of this application, a first resistor may be referred to as a second resistor, and similarly, a second resistor may be referred to as a first resistor. Both the first resistor and the second resistor are resistors, but they are not the same resistor.

[0053] It is understood that the term "connection" in the following embodiments should be understood as "electrical connection," "communication connection," etc., if the connected circuits, modules, units, etc., have electrical signal or data transmission with each other.

[0054] It is understandable that "at least one" refers to one or more, and "multiple" refers to two or more. "At least a part of an element" refers to part or all of an element.

[0055] When used herein, the singular forms of “a,” “an,” and “the” may also include the plural forms unless the context clearly indicates otherwise. It should also be understood that the terms “comprising / including” or “having,” etc., specify the presence of the stated features, wholes, steps, operations, components, parts, or combinations thereof, but do not preclude the possibility of the presence or addition of one or more other features, wholes, steps, operations, components, parts, or combinations thereof. Meanwhile, the term “and / or” as used in this specification includes any and all combinations of the associated listed items.

[0056] COE, short for Color Filter On Encapsulation, is a process that follows the thin-film encapsulation (TFE) of an AMOLED (Active Matrix Organic Light Emitting Diode). It involves depositing R (red), G (green), and B (blue) color filters on the R (red), G (green), and B (blue) light-emitting devices, separated by a black matrix (BM). The goal is to eliminate the need for the polarizer (POL) found in traditional OLED screens. Compared to traditional polarizer technology, COE technology reduces screen thickness, increases display brightness, and lowers device power consumption.

[0057] Typically, to avoid light leakage, the R / G / B color filters, parallel to the screen surface and pointing towards the black matrix, need to extend to the surface of the black matrix away from the TFE (Transparent Surface Equipment). However, during this extension and coverage process, due to the thickness difference between the R / G / B color filters and the black matrix, as well as the thickness difference between the R, G, and B color filters, color filters overflow on the surface of the black matrix away from the TFE. One color filter overflows onto another color filter across the surface of the black matrix away from the TFE. For example, the G color filter overflows onto the B color filter across the surface of the black matrix away from the TFE, leaving G color filter residue at the B color filter. This causes the green color filter to affect the normal light output of the blue light-emitting device when the display panel is in display mode, resulting in color distortion. It also causes a decrease in the proportion of blue reflected light when the display panel is off, resulting in color distortion when the display panel is off.

[0058] In view of this, embodiments of this application provide a display panel capable of improving display color shift and screen-off color shift, as well as a method for manufacturing the same and a display device.

[0059] In one exemplary embodiment, combined with Figure 1 and Figure 2A display panel is provided, which may be, but is not limited to, an OLED display panel. The display panel includes a substrate 10, a light-emitting layer 20, a color filter layer and a blocking layer. The color filter layer includes a color resist layer 40 and a light-shielding portion 50. The color resist layer 40 includes multiple light-filtering portions, and the light-shielding portion 50 is a black matrix BM. The blocking layer includes multiple dam structures 60.

[0060] The substrate 10 may include a substrate and a driving circuit layer located on the substrate BS. The substrate BS serves to support and protect the entire display panel. The substrate BS may be, but is not limited to, a flexible substrate or a rigid substrate. The flexible substrate may include a silicon substrate, a polyethylene terephthalate (PET) substrate, a polyethylene naphthalate (PEN) substrate, or a colorless polyimide (CPI) substrate, etc. The substrate BS may be a single-layer structure or a multi-layer structure. For example, the substrate may include glass, or the substrate may include at least one flexible substrate and at least one buffer layer, with the flexible substrate and buffer layer alternately stacked, etc.

[0061] A buffer layer may be disposed on the substrate BS, and the driving circuit layer is located on the side of the buffer layer away from the substrate BS. The driving circuit layer may include multiple pixel driving circuits arranged in an array. Each pixel driving circuit is electrically connected to at least one light-emitting structure of the light-emitting layer 20 to control the lighting time and brightness of the light-emitting structure. The pixel driving circuit may include capacitors and multiple thin-film transistors (TFTs). The driving circuit layer may include the active layer ACT of each thin-film transistor TFT in multiple thin-film transistor FTFs, located on the side of the buffer layer away from the substrate BS; the gate insulating layer G1, located on the side of the active layer ACT away from the substrate BS; the gate G of the thin-film transistor TFT and the first plate of the capacitor, located on the side of the gate insulating layer GI away from the substrate BS; the interlayer dielectric layer ILD, located on the side of the gate G and the first plate of the capacitor away from the gate insulating layer GI; the source S, drain D of the thin-film transistor TFT and the second plate of the capacitor, located on the side of the interlayer dielectric layer ILD away from the gate G and the first plate of the capacitor; the passivation layer PVX, located on the side of the source S, drain D and the second plate of the capacitor away from the interlayer dielectric layer ILD; and the planarization layer PLN, located on the side of the passivation layer PVX away from the substrate BS.

[0062] The light-emitting layer 20 is located on the side of the driving circuit layer away from the substrate BS, specifically on the side of the planarization layer PLN away from the substrate BS. The light-emitting layer 20 includes multiple light-emitting structures arranged in an array, which may include red, green, and blue light-emitting structures. The red light-emitting structure emits red light, the green light-emitting structure emits green light, and the blue light-emitting structure emits blue light. Each light-emitting structure is separated by a pixel-defining layer (PDL) located on the surface of the planarization layer PLN away from the substrate BS. The light-emitting structure may include a multilayer structure, for example, it may include a stacked anode, hole injection layer, hole transport layer, organic light-emitting functional layer, electron transport layer, electron injection layer, and cathode. The hole injection layer, hole transport layer, organic light-emitting functional layer, electron transport layer, and electron injection layer emit light under the influence of an electric field between the anode and cathode. The light-emitting layer 20 has a light-emitting side, and the light emitted by each light-emitting structure can be observed by facing its light-emitting side.

[0063] The display panel may also include an encapsulation layer 30, located on the side of the light-emitting layer 20 away from the substrate BS. The encapsulation layer 30 encapsulates the light-emitting layer 20, isolating it from external impurities, moisture, oxygen, etc., preventing them from entering the light-emitting layer 20 and corroding its internal structure. It also protects other structures within the display panel. The encapsulation layer 30 can be made of inorganic materials such as nitrides, oxides, oxynitrides, nitrates, carbides, or any combination thereof. The fabrication process can employ chemical vapor deposition (CVD), such as plasma-enhanced chemical vapor deposition (PECVD). For example, the encapsulation layer 30 can be made of materials such as acrylic fiber, hexamethyldisiloxane, polyacrylates, polycarbonate, and polystyrene, and the fabrication process can employ inkjet printing (IJP).

[0064] The color filter layer is located on the light-emitting side of the light-emitting layer 20, specifically on the side of the encapsulation layer 30 away from the substrate BS. The color filter layer includes a color resist layer 40 and a light-shielding portion 50. Both the color resist layer 40 and the light-shielding portion 50 are located on the light-emitting side of the light-emitting layer 20, specifically on the side of the encapsulation layer 30 away from the substrate BS. The color resist layer 40 includes a plurality of filter portions arranged in an array, such as a red filter portion 402 corresponding to a red light-emitting structure, a green filter portion 401 corresponding to a green light-emitting structure, and a blue filter portion 403 corresponding to a blue light-emitting structure; the orthographic projection of the filter portion on the substrate 10 at least partially overlaps with the orthographic projection of the corresponding light-emitting structure on the substrate, for example, the orthographic projection of each filter portion on the substrate 10 respectively covers the orthographic projection of the corresponding light-emitting structure on the substrate 10.

[0065] Each color filter only allows light of its own color to pass through. For example, when light emitted from the light-emitting structure shines on the red filter 402, all other colors of light are filtered out, and only red light can pass through; when light emitted from the light-emitting structure shines on the green filter 401, all other colors of light are filtered out, and only green light can pass through; when light emitted from the light-emitting structure shines on the blue filter 403, all other colors of light are filtered out, and only blue light can pass through.

[0066] The light-shielding part 50 is located between two adjacent light-filtering parts, that is, the two adjacent light-filtering parts are separated by the light-shielding part 50. The light-shielding part 50 is opaque, and the light emitted by the light-emitting structure is almost completely absorbed by the light-shielding part 50 when it shines on the light-shielding part 50.

[0067] Based on this, the end of the light filter near the light shield 50 covers the first part of the light shield 50; a groove 70 is provided on the surface of the second part of the light shield 50 away from the substrate, the second part of the light shield 50 is the part not covered by the light filter, and a dam structure 60 is provided on the surface of the second part of the light shield 50 away from the substrate. The orthographic projection of the dam structure 60 on the substrate is located within the orthographic projection of the light shield 50 on the substrate. The dam structure 60 is used to block the material overflow of the light filter.

[0068] That is, the end of the light-filtering portion near the light-shielding portion 50 is, for example, the edge of the light-filtering portion, and the first part of the light-shielding portion 50 is, for example, the edge of the light-shielding portion 50. A dam structure 60 and a groove 70 are provided on the surface of the light-shielding portion 50 away from the substrate 10, and the edge of the light-filtering portion is located on the surface of the adjacent light-shielding portion 50 away from the substrate 10. There is a gap between the edge of the light-filtering portion and the dam structure 60 and the groove 70. The dam structure 60 and the groove 70 are used to prevent each of the light-filtering portions from overflowing through the adjacent light-shielding portion 50 to the light-filtering portion that is different in color from itself.

[0069] The edge of the light filter is located on the surface of the substrate 10 away from the edge of the adjacent light shield 50, so that the orthographic projection of the light filter on the substrate 10 overlaps with the orthographic projection of the adjacent light shield 50 on the substrate 10. The orthographic projection of the edge of the light filter on the substrate 10 overlaps with the orthographic projection of the edge of the adjacent light shield 50 on the substrate 10. Thus, in a direction parallel to the substrate 10 and along the direction from the light filter to the light shield 50, the light filter is extended and the surface of the light shield 50 away from the substrate 10 is covered, thereby avoiding light leakage in the display. The surface of the light-shielding part 50 away from the substrate 10 is provided with a dam structure 60 and a groove 70. The dam structure 60 has the function of blocking and intercepting, and the groove 70 also has the function of accommodating and blocking. During the fabrication of the filter part, when the filter part extends to the adjacent light-shielding part 50 to cover part of the surface of the light-shielding part 50 away from the substrate 10, the dam structure 60 and the groove 70 together play a blocking role to prevent the filter part from overflowing through the surface of the adjacent light-shielding part 50 away from the substrate 10 to other filter parts with different colors, thereby avoiding the residue of a filter part of another color at the location of a filter part of one color, thereby improving the display color deviation and the screen-off color deviation.

[0070] For example, there is a thickness difference between the green filter portion 401, the light-shielding portion 50, and the blue filter portion 403. Assuming that the green filter portion 401 has the largest thickness, in the process of manufacturing the green filter portion 401, in order to avoid the appearance of gaps between the edge of the green filter portion 401 and the edge of the adjacent light-shielding portion 50, resulting in light leakage, when the green filter portion 401 extends towards the adjacent light-shielding portion 50 to cover part of the surface of the light-shielding portion 50 away from the substrate 10, thereby filling the gaps to avoid light leakage, the dam structure 60 and the groove 70 on the surface of the adjacent light-shielding portion 50 away from the substrate 10 can work together to block the green filter portion 401, preventing the green filter portion 401 from overflowing to the blue filter portion 403.

[0071] If the green filter 401 overflows, it can overflow into the groove 70, achieving the first level of overflow interception. Even if the green filter 401 still overflows from the groove 70, it will be intercepted by the dam structure 60, achieving the second level of overflow interception. Alternatively, if the green filter 401 overflows, the overflow can be intercepted by the dam structure 60, achieving the first level of overflow interception. Even if the green filter 401 overflows by bypassing or crossing the dam structure 60, it can still overflow. The overflow of the green filter 401 through the dam structure 60 will overflow into the groove 70, thus achieving a second layer of overflow interception for the green filter 401. In this way, the green filter 401 can be intercepted twice, preventing it from overflowing through the light-shielding part 50 away from the substrate 10 to the blue filter 403. Therefore, no green filter 401 remains at the blue filter 403. As a result, in the display panel's display state, the normal light emission of the blue light-emitting structure is not affected by the green filter 401, improving color shift. In the display panel's off state, the blue reflected light is not reduced, improving off-screen color shift. Similarly, due to the dam structure 60 and groove 70 of the adjacent light-shielding parts 50 away from the substrate 10 surface, there is no residue, interference, or influence between the blue filter 403, red filter 402, and green filter 401, thus significantly improving display color shift and off-screen color shift.

[0072] In one exemplary embodiment, the dam structure 60 is made of the same material as the shading part 50.

[0073] The light-shielding part 50 is made of an opaque material, such as black resin. The dam structure 60 is made of the same material as the light-shielding part 50, thus eliminating the need for additional materials in the dam structure 60. This reduces the number of materials used in the display panel, simplifies the manufacturing process, and lowers the cost. Furthermore, since the dam structure 60 and the light-shielding part 50 are made of the same material, they can be manufactured in the same process, further simplifying the display panel manufacturing process and reducing its production cost.

[0074] Of course, in other exemplary embodiments, the material of the dam structure 60 may be the same as the material of the pixel limiting layer PDL, or it may be other materials. This application embodiment does not limit this.

[0075] In one exemplary embodiment, reference is made to Figure 2The groove 70 is located between the dam structure 60 and the first part of the light-shielding part 50, that is, between the edge of the dam structure 60 and the edge of the light-filtering part. Thus, when the light-filtering part overflows onto the surface of the adjacent light-shielding part 50 away from the substrate 10, after passing the edge of the light-shielding part 50, the overflow portion first flows into the groove 70 and can be directly contained by it. After the overflow portion is contained by the groove 70, it will basically not overflow to the dam structure 60 again. Even if there is some overflow from the groove 70, the overflow amount will be greatly reduced. The small amount of overflow is further blocked by the dam structure 60, thus completely preventing overflow to other color light-filtering parts. Since the overflow amount reaching the dam structure 60 is very small, the height of the dam structure 60 does not need to be too high. This is beneficial for the manufacturing of the dam structure 60, helps save costs, reduces the thickness of the display panel, and the lower dam structure 60 also has higher stability.

[0076] Of course, in other exemplary embodiments, the dam structure 60 may also be located between the groove 70 and the edge of the filter portion, that is, between the groove 70 and the first part of the light-shielding portion 50. In this way, when the filter portion overflows onto the surface of the adjacent light-shielding portion 50 away from the substrate 10, after passing the edge of the light-shielding portion 50, the overflow portion is first blocked by the dam structure 60. A portion of the blocked portion can stay on the surface of the edge of the light-shielding portion 50 away from the substrate 10, which is used to further block and fill the gap between the edge of the light-shielding portion 50 and the edge of the filter portion, thereby more reliably preventing light leakage from the display. The other portion that is not blocked by the dam structure 60 can continue to overflow into the groove 70 and be received by the groove 70, which can also substantially completely prevent overflow to the filter portions of other colors.

[0077] In one exemplary embodiment, the thickness of the dam structure 60 is less than or equal to the maximum thickness of the filter section. This is beneficial for the fabrication of the dam structure 60, helps to save costs, reduces the thickness of the display panel, and also provides greater stability for the shorter dam structure 60.

[0078] Furthermore, in this embodiment, the cross-sectional shape of the dam structure 60 can be rectangular, trapezoidal, or other shapes, as long as it can reliably block the overflow of material from the filter section; there is no limitation on this. Additionally, the contour shape of the groove 70 can also be varied, as long as it can reliably accommodate and block the overflow of material from the filter section.

[0079] In an exemplary embodiment, the size of the groove 70 is the same as the size of the dam structure 60 in a direction parallel to the substrate 10 and pointing from the filter portion to the light-shielding portion 50. This facilitates ensuring that the groove 70 can accommodate a large amount of the overflow from the filter portion and that the dam structure 60 can reliably block the overflow from the filter portion. Furthermore, the fact that the size of the groove 70 is the same as the size of the dam structure 60 makes it easier to manufacture the groove 70 and the dam structure 60, simplifying their fabrication process.

[0080] In one exemplary embodiment, reference is made to Figure 3 The groove 70 is disposed around the filter portion, and the dam structure 60 is disposed around the filter portion; for example, the groove 70 is disposed around the circumference of the filter portion, and the dam structure 60 is disposed around the circumference of the filter portion. This helps to ensure that the groove 70 collects the overflow of the filter portion around the circumference of the filter portion, and ensures that the dam structure 60 reliably blocks the overflow of the filter portion around the circumference of the filter portion, so that the filter portion will not overflow into the filter portion of other colors in any direction along the direction parallel to the substrate 10.

[0081] In one exemplary embodiment, combined with Figure 4 and Figure 5 The second part of the light-shielding portion 50 has a plurality of grooves 70 and a plurality of dam structures 60 on the surface of the side opposite to the substrate 10.

[0082] For example, between two adjacent filter sections, there may be multiple grooves 70, multiple dam structures 60, or multiple grooves 70 and multiple dam structures 60; wherein the arrangement direction of the multiple grooves 70 and multiple dam structures 60 includes at least one of the following: multiple grooves 70 are arranged sequentially along the circumference of the filter section; multiple grooves 70 are arranged sequentially along the connecting line between two adjacent filter sections; multiple dam structures 60 are arranged sequentially along the circumference of the filter section; multiple dam structures 60 are arranged sequentially along the connecting line between two adjacent filter sections; along the circumference of the filter section On the upper part, the dam structure 60 and the groove 70 are arranged alternately; along the connecting line between two adjacent filter parts, the dam structure 60 and the groove 70 are arranged alternately; in the embodiments of this application, the different arrangements of the dam structure 60 and the groove 70 can adapt to different overflow blocking requirements in actual applications, such as different overflow blocking angles, different overflow blocking degrees, etc. In actual applications, the specific arrangement of the groove 70 and the dam structure 60 can be arranged according to the actual overflow blocking requirements. The embodiments of this application do not limit the specific arrangement of the groove 70 and the dam structure 60, and all of them are within the protection scope of this application.

[0083] In an exemplary embodiment, the thickness of the green filter portion 401 is greater than the thickness of the red filter portion 402, and the thickness of the red filter portion 402 is greater than the thickness of the blue filter portion 403; the number of dam structures 60 and grooves 70 between the green filter portion 401 and the adjacent blue filter portion 403 is greater than the number of dam structures 60 and grooves 70 between the red filter portion 402 and the adjacent blue filter portion 403; the number of dam structures 60 and grooves 70 between the green filter portion 401 and the adjacent blue filter portion 403 is greater than the number of dam structures 60 and grooves 70 between the green filter portion 401 and the adjacent red filter portion 402.

[0084] Among them, the luminous efficiency of the green luminescent structure is greater than that of the red luminescent structure, and the luminous efficiency of the red luminescent structure is greater than that of the blue luminescent structure. Therefore, reflectivity or reflected color should be considered, and reference should be made. Figure 2 The thickness h1 of the green filter 401 can be set to be greater than the thickness h2 of the red filter 402, and the thickness h2 of the red filter 402 can be greater than the thickness h3 of the blue filter 403. Based on this, considering that there is a large thickness difference between the green filter 401 and the blue filter 403 and the red filter 402 respectively, the green filter 401 is prone to overflowing to the blue filter 403 and the red filter 402. Therefore, the number of dam structures 60 and grooves 70 between the green filter 401 and the adjacent blue filter 403 is relatively larger, thereby reliably suppressing the overflow of the green filter 401 to the blue filter 403 and the red filter 402.

[0085] In an exemplary embodiment, the thickness of the green filter portion 401 is greater than the thickness of the red filter portion 402, and the thickness of the red filter portion 402 is greater than the thickness of the blue filter portion 403; the depth of the groove 70 between the green filter portion 401 and the adjacent blue filter portion 403 is greater than the depth of the groove 70 between the red filter portion 402 and the adjacent blue filter portion 403, and is also greater than the depth of the groove 70 between the green filter portion 401 and the adjacent red filter portion 402; thus, it is also possible to further reliably suppress the overflow of the green filter portion 401 to the blue filter portion 403 and the red filter portion 402.

[0086] In an exemplary embodiment, the thickness of the green filter portion 401 is greater than the thickness of the red filter portion 402, and the thickness of the red filter portion 402 is greater than the thickness of the blue filter portion 403; the thickness of the dam structure 60 between the green filter portion 401 and the adjacent blue filter portion 403 is greater than the thickness of the dam structure 60 between the red filter portion 402 and the adjacent blue filter portion 403, and also greater than the thickness of the dam structure 60 between the green filter portion 401 and the adjacent red filter portion 402; thus, it is also possible to further reliably suppress the overflow of the green filter portion 401 to the blue filter portion 403 and the red filter portion 402.

[0087] In one exemplary embodiment, reference is made to Figure 6 The display panel also includes a touch layer 80, which is located between the encapsulation layer 30 and the color filter layer. The touch layer 80 may be composed of multiple layers of metal, inorganic and organic films to realize the touch function of the display panel.

[0088] In one exemplary embodiment, reference is made to Figure 7 The display panel also includes a transparent protective film 90, which is located on the side of the color filter layer away from the substrate 10. The transparent protective film 90 is used to encapsulate and protect the color filter layer. The material of the transparent protective film 90 layer is, for example, but not limited to, polyethylene terephthalate (PET).

[0089] In this embodiment, the display panel may further include a cover plate or other film layer, which may be located on the side of the transparent protective film 90 away from the substrate 10, to further protect the color filter layer and the light-emitting layer 20. The material of the cover plate is, for example, but not limited to, colorless polyimide.

[0090] In one exemplary embodiment, reference is made to Figure 8 This application also provides a display device, which includes the display panel provided in any of the above embodiments. The display device may be an OLED display device. For example, the display device may be a screen, mobile phone, laptop, tablet computer, wearable display device (such as a smartwatch, smart glasses, etc.), television set, digital photo frame, or any other electronic product or component with display functionality.

[0091] The display device and display panel provided in the embodiments of this application belong to the same inventive concept, can solve the same technical problem, and thus achieve the same technical effect. Repeated content will not be repeated here.

[0092] In one exemplary embodiment, reference is made to Figure 9 This application also provides a method for manufacturing a display panel, which can be used to manufacture the display panel provided in any of the above embodiments. The method includes:

[0093] S902 provides a substrate.

[0094] S904, a light-emitting layer is formed on one side of the substrate, and the light-emitting layer includes multiple light-emitting structures.

[0095] S906, a color filter layer is formed. The color filter layer is disposed on the side of the light-emitting layer away from the substrate. The color filter layer includes multiple filtering portions and multiple light-shielding portions. The orthographic projection of the filtering portion onto the substrate and the orthographic projection of the light-emitting structure onto the substrate overlap at least partially. The filtering portion is located between two adjacent light-shielding portions. The end of the filtering portion near the light-shielding portion covers a first portion of the light-shielding portion. A groove is provided on the surface of the second portion of the light-shielding portion away from the substrate. The second portion is the portion not covered by the filtering portion.

[0096] S908, forming a barrier layer, the barrier layer including multiple dam structures, the dam structures are disposed on the surface of the second part of the light-shielding part away from the substrate, the orthogonal projection of the dam structures on the substrate is located within the orthogonal projection of the light-shielding part on the substrate, the dam structures are used to block the material overflow of the light-filtering part.

[0097] In an exemplary embodiment, forming the color filter layer in step S906 includes:

[0098] S9061 forms a light-shielding film layer, which is located on the light-emitting side of the light-emitting layer.

[0099] S9062, etching the light-shielding film layer to form dam structures, grooves, openings and light-shielding parts on the light-shielding film layer, wherein the openings correspond one-to-one with the light-emitting structures.

[0100] In this way, the material of the dam structure and the material of the light-shielding part are the same, so there is no need to introduce additional materials for the dam structure. This helps to reduce the types of materials in the display panel, simplify the manufacturing process of the display panel, and reduce the cost of the display panel. Furthermore, the light-shielding part and the dam structure are manufactured in the same process, which further simplifies the manufacturing process of the display panel and reduces the production cost of the display panel.

[0101] S9063 forms a corresponding filter section within the opening.

[0102] The method for preparing the display panel and the display panel provided in this application are based on the same inventive concept, can solve the same technical problems, and thus achieve the same technical effects. Repeated content will not be described again here.

[0103] In the description of this specification, references to terms such as "some embodiments," "other embodiments," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this application. In this specification, the illustrative descriptions of the above terms do not necessarily refer to the same embodiments or examples.

[0104] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0105] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are specific and detailed, they should not be construed as limiting the scope of this application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these modifications and improvements all fall within the protection scope of this application. Therefore, the protection scope of this application should be determined by the appended claims.

Claims

1. A display panel, characterized in that, include: substrate; A light-emitting layer is disposed on one side of the substrate, and the light-emitting layer includes multiple light-emitting structures; A color filter layer is disposed on the side of the light-emitting layer opposite to the substrate. The color filter layer includes multiple filtering portions and multiple light-shielding portions. The projection of the filtering portion onto the substrate at least partially overlaps with the projection of the light-emitting structure onto the substrate. The filtering portion is located between two adjacent light-shielding portions. The end of the filtering portion near the light-shielding portion covers a first portion of the light-shielding portion. A groove is formed on the surface of the second portion of the light-shielding portion on the side away from the substrate. The second portion is the portion not covered by the filtering portion. The barrier layer includes multiple dam structures disposed on the surface of the second portion of the light-shielding part away from the substrate. The orthographic projection of the dam structure onto the substrate is located within the orthographic projection of the light-shielding part onto the substrate. The dam structure is used to block material overflow from the light-filtering part.

2. The display panel according to claim 1, characterized in that, The groove is located between the dam structure and the first part of the shading section.

3. The display panel according to claim 1, characterized in that, Along the direction from the first part to the second part, the size of the groove is the same as the size of the dam structure.

4. The display panel according to claim 1, characterized in that, The groove is arranged around the filter part, and the dam structure is arranged around the filter part.

5. The display panel according to claim 1, characterized in that, The second part of each of the light-shielding portions has a plurality of grooves and a plurality of dam structures on the surface of the side facing away from the substrate; Optionally, the arrangement of the plurality of grooves and the plurality of dam structures includes at least one of the following: The plurality of grooves are arranged sequentially along the circumferential direction of the filter portion; The plurality of grooves are arranged sequentially along the connecting line between two adjacent filter portions; The plurality of the dam structures are arranged sequentially along the circumference of the filter section; The plurality of the dam structures are arranged sequentially along the connecting line between two adjacent filter sections; Along the circumference of the filter section, the dam structure and the groove are arranged alternately.

6. The display panel according to claim 1, characterized in that, The material of the dam structure is the same as the material of the light-shielding part.

7. The display panel according to any one of claims 1-6, characterized in that, The plurality of filter elements include a red filter element, a green filter element, and a blue filter element; The thickness of the green filter is greater than the thickness of the red filter, and the thickness of the red filter is greater than the thickness of the blue filter. Optionally, the number of dam structures and grooves between the green filter and the adjacent blue filter is greater than the number of dam structures and grooves between the red filter and the adjacent blue filter. Optionally, the number of dam structures and grooves between the green filter and the adjacent blue filter is greater than the number of dam structures and grooves between the green filter and the adjacent red filter. Optionally, the thickness of the dam structure between the green filter and the adjacent blue filter, and the depth of the groove, are both greater than the thickness of the dam structure between the red filter and the adjacent blue filter, and the depth of the groove. Optionally, the thickness of the dam structure between the green filter and the adjacent blue filter, and the depth of the groove, are both greater than the thickness of the dam structure between the green filter and the adjacent red filter, and the depth of the groove.

8. A display device, characterized in that, Includes the display panel as described in any one of claims 1-7.

9. A method for manufacturing a display panel, characterized in that, include: Provide substrate; A light-emitting layer is formed on one side of the substrate, and the light-emitting layer includes multiple light-emitting structures; A color filter layer is formed, wherein the color filter layer is disposed on the side of the light-emitting layer opposite to the substrate, and the color filter layer includes a plurality of filtering portions and a plurality of light-shielding portions; wherein the orthographic projection of the filtering portion on the substrate at least partially overlaps with the orthographic projection of the light-emitting structure on the substrate, and the filtering portion is located between two adjacent light-shielding portions; the end of the filtering portion near the light-shielding portion covers a first portion of the light-shielding portion; a groove is formed on the surface of the second portion of the light-shielding portion on the side opposite to the substrate, and the second portion is the portion not covered by the filtering portion; A barrier layer is formed, the barrier layer including a plurality of dam structures, the dam structures being disposed on the surface of the second part of the light-shielding part opposite to the substrate, the orthogonal projection of the dam structures on the substrate being located within the orthogonal projection of the light-shielding part on the substrate, the dam structures being used to block the material overflow of the light-filtering part.

10. The method according to claim 9, characterized in that, The formation of the color filter layer includes: A light-shielding film layer is formed, and the light-shielding film layer is located on the light-emitting side of the light-emitting layer; The light-shielding film layer is etched to form the dam structure, the groove, the opening and the light-shielding part on the light-shielding film layer, wherein the opening corresponds one-to-one with the light-emitting structure; The corresponding filter portion is formed within the opening.

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